Don’t switch loans without crunching the numbers
Refinancing (moving to a new loan or lender) might be a good move if you’re not getting a competitive deal on your home loan but you can easily fall into some traps if you don’t crunch the numbers.
The golden rule
The golden rule ofrefinancing is to make sure what you save in repayments by moving to a loan with a lower interest rate outweighs all the different costs you incur by switching loans.
Working out what you save in repayments is straightforward. Use the calculator at to work out the total interest cost of your current loan and note down the figure. Then enter the details for the new loan you’re considering and note down that figure. The difference is the amount you save.
Working out the costs is more difficult, but well worth doing.Make sure you’ve considered and asked both your existing and the new lender about all these costs:
  • Break cost: Charged for exiting a fixed-rate loan, this costwill vary depending on the amount you still owe and how much longer your interest rate is fixed for. Beware this cost, which can be significant, especially for loans that offer some sort of introductory low rate
  • New establishment/application fees
  • Valuation fees
  • Loan approval fees
  • Settlement and handling fees
  • Additional mortgage stamp duty
  • Additional lenders mortgage insurance (LMI)
  • Mortgage registration
  • Legal fees
  • Account fees on the new loan
The total amount when you add all these costs together will vary according to your individual situation, but you’ve got to be sure that this total is well below the amount you’ll save on your repayments – otherwise it won’t be worth switching loans.
As a rough guide, aim to refinance only if you’re certain what you save on your repayments will allow you to recoup your total costs within 12-18 months. 
TIP: A good mortgage broker has better buying and negotiating power than you have, so by using a mortgage broker to refinance you should be able to obtain a lower effective rate. Find brokers in your area at a leading mortgage website like
How much will you save?
Use this checklist to work out if switching mortgages will save you money.
Costs ($)  
Early termination penalties (ask your current lender)  
Costs of establishing a new mortgage (ask your broker)  
Establishment fee  
Valuation fee  
Mortgage insurance  
Mortgage stamp duty  
Solicitors' fees  
Other charges  
Total costs A
Savings ($)  
Interest savings over term of the loan 
Use the calculator at to work out the total interest cost of your current loan
Now enter the details for the new loan, if the total interest paid figure is lower, the difference between that number and the total interest paid on your current loan is the amount saved
Fees saved
If your current mortgage has ongoing fees, multiply that monthly fee by the number of months in the loan term (30 years = 12 x 30, so if you pay $10 per month, the calculation is 12 x 30 x 10 = $3,600)
Total savings B
Net savings [B-A]